NP2 (N6) Pure Nickel Wire with High Heat Resistance

High heat resistance is a property, not a promise — and it starts with the metal itself. This NP2 pure nickel wire, the GB designation for N6 at ≥99.5% Ni+Co, keeps its structure and surface through repeated thermal cycling, with a melting point of 1435-1446°C and a stable oxide film that resists high-temperature oxidation and sulfidation. Drawn from 0.025 mm to 10 mm on our own nickel line, it serves heating elements, furnace components and high-temperature instrument leads, and it is one of the easiest grades to trial: an N6/NP2 sample is free, and micro wire starts at a 1 kg MOQ.

"Heat resistance" and "heating wire" are not the same requirement. This NP2 pure nickel wire resists heat — it holds dimensional stability, oxidation resistance and mechanical properties at elevated temperatures, which is why it is used for furnace components, heater supports and high-temperature leads. It does not generate heat through high resistance; nickel's resistivity is only 0.096 μΩ·m, making it a conductor. If your application is a resistance heating element that must develop heat, that is the territory of nickel-chromium alloys such as NiCr, a different product line. Specify pure nickel wire when you need a heat-tolerant conductor or structural wire, not when you need a heating element alloy.

Note: micro wire (≤0.05 mm) is available at a 1 kg MOQ; standard wire sizes start at a 5 kg MOQ. The thickness and dimensions can be produced to customer requirements — submit your drawing for confirmation.

• High heat resistance — stable under high temperature and thermal cycling without deformation or embrittlement, with a melting point of 1435-1446°C.
• Oxidation and sulfidation resistance — a dense oxide film protects the wire in high-temperature oxidizing environments.
• Pure-nickel economy grade — NP2/N6 at ≥99.5% Ni+Co delivers reliable high-temperature service at the most economical price band.
• Low resistance — 0.096 μΩ·m keeps heat loss low in current-carrying high-temperature service.
• Easy to trial — free N6/NP2 sample (0.5 kg) and a 1 kg micro-wire MOQ let you verify performance before committing.

For pure nickel, heat resistance shows up in three behaviours: the melting point (1435-1446°C), a stable oxide film that resists oxidation and sulfidation at temperature, and retained ductility across thermal cycles. NP2/N6 holds these properties while staying a good conductor (0.096 μΩ·m). Note the practical boundary: nickel resists high-temperature oxidation and sulfidation, but the service limit depends on atmosphere, stress and time at temperature — confirm your operating conditions and we will verify the grade against them before you order.

NP2 is the GB designation for N6, minimum 99.5% Ni+Co with carbon capped at 0.10%. The same line draws NP1/N4 (≥99.9%), Ni200 (≥99.2%) and Ni201 (≥99.0%, C ≤0.02%). For high-temperature service, the low-carbon grades (Ni201, N4) are preferred where the wire sees sustained heat and carbon-sensitive behaviour matters; NP2 covers general high-temperature duty at the lowest cost per kg. All four are commercial-purity nickel, not alloys — state the designation on your order and the mill certificate will match it.

Wire is available from 0.025 mm micro sizes to 10 mm, in soft, hard or 1/2 hard temper, with custom diameters confirmed per drawing. Annealed (soft) temper offers the best formability for coiling and winding around furnace structures; hard or 1/2 hard holds shape in self-supporting leads. Tell us the forming process in your line and the temper will be matched accordingly.

Before committing to production quantity, verify the wire in your own furnace or assembly: request an N6/NP2 sample (free, 0.5 kg), run your heat cycle and weld test, and confirm the chemistry against the mill certificate. Production follows at 1 kg MOQ for micro wire or 5 kg for standard sizes, with the same batch-level inspection — composition, dimensions, mechanical properties and surface — applied to your order as to the sample.

Every batch passes chemical composition analysis, dimensional measurement, mechanical property testing and surface inspection before release, and batch test records accompany the shipment. For high-temperature service, surface condition matters — oxides and contaminants are the first failure points — so surface inspection is performed per spool on micro sizes.

• N4 (NP1) / N6 (NP2) wire — GB/T 21653 (Nickel and Nickel Alloy Wire and Drawing Stock)
• Ni200 / Ni201 wire — ASTM B164 (Nickel Rod, Bar and Wire)
• Export documentation — EN 10204 3.1 MTC

• Standards: GB/T 21653-2008; ASTM B164; EN 10204
• Industry literature: ASM Specialty Handbook: Nickel, Cobalt, and Their Alloys (ASM International); Nickel Institute corrosion and application guides
• Primary sources: factory catalog, mill test certificates (EN 10204 3.1), ISO 9001 / SGS certifications

Micro and fine wire is wound on spools and packed in carton boxes; larger diameters are supplied as coils in polybags or on spools as requested. Delivery is 3-7 days for small in-stock quantities, 7-15 days for standard production, and 15-30 days for complex custom requirements confirmed against your drawing.

Trying a new supplier should cost you time to test, not money to gamble — which is why our N6/NP2 sample is free and the MOQ starts at 1 kg for micro wire. Behind that low entry point is a full nickel line: melting, drawing, heat treatment, finishing and testing run in-house at DLX, a nickel-only factory established in 2002 with ISO 9001 & SGS certified systems, 10,000 t/yr capacity and EN 10204 3.1 documentation on export orders.

Submit your drawing and quantity for a confirmed quote.

The melting point is 1435-1446°C, but service limits depend on atmosphere, stress and time at temperature. Confirm your operating conditions with our engineers and we will verify the grade and surface against them before you order.

NP2/N6 (≥99.5%, C ≤0.10%) is the economical choice for general high-temperature duty. Where the wire sees sustained heat and low-carbon behaviour matters, Ni201 (C ≤0.02%) or N4 (≥99.9%) is preferred. All are commercial-purity nickel, not alloys.

Round wire from 0.025 mm to 10 mm, in soft, hard or 1/2 hard temper. Dimensional tolerances are locked per drawing at order confirmation; micro sizes (≤0.05 mm) are drawn to the tight end of the range.

Request an N6/NP2 sample — free, 0.5 kg — run your heat cycle and weld test, and verify the chemistry against the mill certificate. Production follows at 1 kg MOQ (micro) or 5 kg (standard).

Micro wire (≤0.05 mm) starts at 1 kg; standard wire at 5 kg. Samples are free for N6/NP2 and Ni200 (0.5 kg); N4 and Ni201 samples are charged and refunded on a first order of 50 kg or more.

Small in-stock quantities ship in 3-7 days; standard production in 7-15 days; complex custom requirements in 15-30 days after drawing confirmation. Export orders include EN 10204 3.1 mill test certificates and batch test records.